Expansion means for furnaces



Nov. 20, 1928.' 1,692,576

M. M. ROTE EXPANSION MEANS FOR FURNACES Filed April 2Q 1928 2Sheets-Sheet qw b m N l If u H M M H036,

Nov. 20, 1928.

M. M. ROTE EXPANSION MEANS FOR FURNACES Filed April 26, 1928 2Sheets-Sheet Patented Nov. 20, 1928.

UNITED sures PATENT onion;

MORGAN M; BOTE, F SUNBURY, PENNSYLVANIA, ASSIGNOR OF ONE-HALE CHARLESgJ. REITZ, OF-SUHBURY, PENBISYLVANIA.

EXBANSION MEANS FOR FURNACES.

Application filed April 26, 1928. Serial No;

The invention relates to hot air furnaces.

In hot air furnaces the heating unit is enclosed by a spaced casingthrough which air proceeds from the bottom of the casing to the upperpart to be distributed to one or more hot air flues to the building forheating it.

It will be apparent that the relative expansion of the heating unit andthe spaced casing will be different at different periods. Heretoforethis relative expansion has caused warping of parts and in someinstances complete breaking down thereof and necessitating fre quentrepair and replacement.

This invent-ion has for its object the provision of means by which theheating unit and the casin are connected by means of adjustable membersso that the heating unit and the casing may expand and contractrelatively to one another without damage to the parts.

The invention will be described in detail hereinafter and will be foundillustrated in the accompanying drawings in which Figure 1 is a frontview in elevation of a furnace showing the improved means for connectingthe casing to the heating unit,

Figure 2 is a transverse sectional view on a plane indicated by the line2--2 of Figure 1, said view being taken on a vertical plane,

Figures 3 and 4 are horizontal transverse sectional views on planesindicated by lines 3-3 and 4-4, respectively, of Figure 1,

Figure 5 is a sectional detail on the plane indicated by the line 5-5 ofFigure 2, and

Figure 6 is sectional detail on a plane inclicated by the line 6-6 ofFigure 5.

In the drawings similar reference characters are used to designatecorresponding parts throughout the several views.

The furnace illustrated in the drawings is of the type known as a onepipe furnace that has a casing A, and a heating unit B. The casing Acomprises a cylindrical section 1 in which is contained the unit B, adome 2 that seats on the cylindrical portion 1, and 3 indicates a hotair flue from the dome 2. It will beunderstood that instead of a singlehot air flue 3 that a plurality of fines may be provided where thefurnace is used to distribute the hot air from the casing A to theindividual rooms.

The cylindrical portion 1 is open in the front to receive the heatingunit B, and has the edges of the casing at the opening returnedoutwardly as shown .at 4;.

The heating unit B has an ash container 5, a combustion chamber 6, and aradiator 7 With the smoke flue 8 connected therewith andeX- tendingoutwardly through an opening 9 in the cylindrical portion 1. The ashcontainer 5 has a front plate 10 secured theretoand extended above thetop thereof. 11 indicates a hinged doorvmounted on the plate 10 closingthe opening to the ash container. The side edges of the front plate 10are returned outwardly as shown at 12. 13 are sliding clamp membershaving their edges inturned as shown at 1 1 to engage the returned edges4 and 12 to hold them in engagement, this structure, however, as it willbe apparent, permitting relative movement of the returned portions 4:and 12 that ,maybe occasioned by differences in temperature of the partsconnected therewith, that is the cylindrical casing member 1, and theheating unit B. A front'plate 15 is provided to coverthe upper portionof the heating unit B and the lower edge of said front plate 15 hasspaced flanges 16 that slidably engage the front plate 10, 17 indicatinga trans verse shoulder member on the front plate 10 that forms a stopand a seat for. the bottom edge of the front plate 15. Front plate 15 isprovided with a fuel door 18 that connects through the telescoping fuelduct 19 on the front plate 15 and 20 on the. combustion chamber 6 withthe interior thereof. The side edges of the removable front plate 15have outwardly returned portions 21, and 22 are clamp members of similarconstruction to clamp members 18 having inturned edges 23 that engagethe outwardly returned portions land 21 to hold the parts together, and.still permit relative movement thereof as in the matter of theconnection of the clamp members 13 hereinbefore referred to.

The opening 9 hereinbefore referred to for A and the heating unit B thuscausing the a smoke flue 8 to move relatively to the cylindrical portion1 will be compensated for Without permitting leakage of the heated airwithin the casing A, and thus avoiding disarrangement of parts by saidrelative expansion Where not compensated for.

What is claimed is a In a furnace structure, a casing, a heating unit inthe casing, the casing and unit having returned flanges on their meetingedges and channeled slide members engaging said flanges to hold theheating unit in the casing 20 and permit relative expansion of saidparts. In testimony whereof I afiix my signature.

MORGAN M. ROTE.

